Abstract: Porous metals are applied in many more fields than other porous materials. Pores in porous metal parts manufactured by selective laser melting (SLM) should not be regarded as defects but favorable characters because they are the main composition of porous metal parts. Therefore, fully densification is not the only target in forming metal parts via SLM. The formation mechanism of pores in SLM is studied mathematically in this article, and mathematical model is built to describe the formation mechanism. It is concluded that the shape of pores and the porosity of parts are the function of SLM processing parameters and the diameter of powder particles. Pores can be controlled and estimated by adjusting processing parameters and the nature of forming materials. Porous metal parts produced by SLM can be applied in many more fields owing that SLM technology is flexible to change the shape of these part and the nature of materials.
Abstract: Outlined the principles of high-pressure slip casting , this paper finished the modeling of the mold plates of a certain type of high-pressure slip casting machine used for daily ceramics, and then carried out finite element static analysis for it , The result can privileged that the strength and stiffness was meet the design requirements.
Abstract: The automatic generation of flow path is the key and most difficult task in Hydraulic Manifold Blocks (HMB) design. This paper divides the HMB layout space into grids, and sets the HMB boundaries and existing flow paths to obstacles, and the paths generated using maze algorithm are regarded as the initial population of genetic algorithm. The optimal path with the shortest path and least turnings can be obtained using genetic algorithm. The ports of flow path can be connected after the generation of technical holes based on the blind holes. The design parameters of holes, such as starting point coordinates, orientations and depths, can be obtained through a series of algorithms, and then drive the secondary development system HMBDesigner based on SolidWorks to generate three-dimensional solid model. This paper also discusses the generation method of multi-port flow path and multiple flow paths.
Abstract: KeyWords: parks; landscape research; design of seats; bionics design Abstract: Landscape is an important ingredient of city parks, so the design of seats in the parks integrated with the city landscape serves as an innovative inspiration for the design of the specific product. With the research of the landscape design and park seats, this project proposes flower as the developing form of the park seats, with the lily as the final design choice for a new seat in the parks. The specific structural forms of the seats are designed in accordance with the characteristics of lily, and the materials for the seats are chosen based on the park seats and bionics design. An integration of landscape and bionics in this design brings an innovation for the design of the landscape and seats in the parks.
Abstract: Innovation design is a process that makes it easily to satisfy individual customer demands. This study is aimed to realize the innovation design of complex equipment with better satisfaction to the individual customer needs. Firstly, the optimization mathematical model of innovation design was established. Secondly, structural repository of multi-granularity was developed to support innovation design. Finally, in the application of the design of hydro cylinder of injection molding equipment, we demonstrated that our method successfully generated new designs with optimal design lifetime.
Abstract: The influence of Nb2O5 on the phase and microstructure evaluation and mechanical properties of Nb2O5-Al2O3 ceramics sintered with 2.45 GHz microwave energy was investigated. The results showed that Nb2O5 could densify the pure alumina with a lower sintering temperature and a short sintering time. Nb2O5 reacted with Al2O3 to form AlNbO4 completely and the amount of AlNbO4 increased with the increasing content of Nb2O5, distributing at the Al2O3 grain boundaries. The specimen doped with 10 vol.% Nb2O5 sintered at 1500 °C exhibited plenty of columnar grains with draw ratio about 1:3. The existence of columnar grains enhanced the microhardness and fracture toughness of Nb2O5-Al2O3 ceramics.
Abstract: This paper is intended to explore a new method which the tradional lacuqer art is applied in contemporary furniture. The new furniture is called as new cultural furniture. It is full of the sense of the times as well as the Eastern taste. By practicing, the three principles, which infuse the lacquer art with a new life, are concluded. They are the modular design of the lacquer decoration, the modernization of techniques, and the judicious choice of patterns and images in accordance with the taste of the times.
Abstract: The NC grinding of Si3N4 ceramics rotary curved surface workpieces was carried on the CNC jig grinders, combining the nomal tracing grinding and the arc envelope forming grinding. According to the grinding track, a grinding surface scallop height model was built. The model analysis indicated that workpiece curvature, wheel radius and feed rate affected the surface roughness. A prediction model based on the response surface methodology (RSM) was built to study the influences of these processing parameters on the surface roughness, using the Box-Behnken design to design the grinding experiments. It was shown that the surface roughness of rotary curved surface workpieces grinding which increased with increasing workpiece curvature could be reduced by chosen larger radius wheel and lower feed rate. The confidence and practicality of the prediction model is high in experimental conditions. The process parameters can be selected to improve the quality of the surface based on the model of the paper.
Abstract: Because the metallic hafnium has good combination properties, that makes it the preferred material for control rods of nuclear reactors. To prevent the irradiation deformation and the mechanical property decrease of hafnium plates, and to increase the service life of the control rods, a new type of square-tube control rod is developed. The elemental composition, mechanical property, the corrosion resistance and the physical characteristics of hafnium are researched. Several tests are carried out after the product manufactured, which prove that the design and manufacture of the control rod meet the requirement of the technical conditions.
Abstract: A vehicle Cruise Control System(CCS) was designed based on Finite State Machine(FSM) theory and variable universe fuzzy logical theory. The system can control throttle angle and brake pressure coordinately by modeling vehicle powertrain. The simulation results show that vehicle under the proposed system controlled can be drived along the state switch curve, so as to make the vehicle follow the desired acceleration command accurately. And this control system provides satisfactory tracking performances and suitability insinuations such as traction, vehicle tracking and braking.